Gordy you may get alot of different answers on this one like 20 to 50 fps per inch. I would call remington as they have put there factory ammo through both the carbine and the 22" and if you handload you would be able to make up alot of the loss. I have the whelen in 22" but have not yet used a chrony Years ago i bought a 760 pump ion 30/06 22" it now has an 18" You can always cut it down later but you cant add on Goodluck Tanoose